Showing previews UI for Offline Previews

chrome/browser/android/offline_pages/offline_page_bridge.cc

Index: chrome/browser/android/offline_pages/offline_page_bridge.cc
diff --git a/chrome/browser/android/offline_pages/offline_page_bridge.cc b/chrome/browser/android/offline_pages/offline_page_bridge.cc
index 41a74dae994067c082d2aa599271076a4b94c78a..0c97c7e235f997cb8d532f076feffe2216901bb3 100644
--- a/chrome/browser/android/offline_pages/offline_page_bridge.cc
+++ b/chrome/browser/android/offline_pages/offline_page_bridge.cc
@@ -494,20 +494,31 @@ ScopedJavaLocalRef<jstring> OfflinePageBridge::GetOfflinePageHeaderForReload(
   // reload request in order to keep the consistent behavior if we do decide to
   // load the offline page. For example, "id" field should be kept in order to
   // load the same offline version again if desired.
   offline_pages::OfflinePageHeader offline_header_for_reload = *offline_header;
   offline_header_for_reload.reason =
       offline_pages::OfflinePageHeader::Reason::RELOAD;
   return ScopedJavaLocalRef<jstring>(ConvertUTF8ToJavaString(
       env, offline_header_for_reload.GetCompleteHeaderString()));
 }
 
+jboolean OfflinePageBridge::IsShowingOfflinePreview(
+    JNIEnv* env,
+    const base::android::JavaParamRef<jobject>& obj,
+    const JavaParamRef<jobject>& j_web_contents) {
+  content::WebContents* web_contents =
+      content::WebContents::FromJavaWebContents(j_web_contents);
+  if (!web_contents)
+    return false;
+  return offline_pages::OfflinePageUtils::IsShowingOfflinePreview(web_contents);
+}
+
 void OfflinePageBridge::GetRequestsInQueue(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jobject>& j_callback_obj) {
   ScopedJavaGlobalRef<jobject> j_callback_ref(j_callback_obj);
 
   RequestCoordinator* coordinator =
       offline_pages::RequestCoordinatorFactory::GetInstance()
           ->GetForBrowserContext(browser_context_);